C# 微信JSSDK 获取配置信息
本内容部分内容是搬运来，并个人稍加改良完成。
/// <summary> /// 微信JSSDK基础信息 /// </summary> public class WechatJSSDKController : ApiController { private static string appid = ConfigurationManager.AppSettings["appID"]; private static string appsecret = ConfigurationManager.AppSettings["appsecret"]; /// <summary> /// 获取微信配置基础信息 /// </summary> /// <returns></returns> [HttpPost] public WXShare GetWxShareInfo() { var context = HttpContext.Current; string url = Common.ObjectToString(context.Request["url"]); DateTime now = DateTime.Now; var timestamp = GetTimeStamp(now);//取十位时间戳 var guid = Guid.NewGuid().ToString("N");//随机串 var ticket = "";//签名密钥 try { WXShare s = new WXShare(); //取缓存中的Ticket，没有则重新生成Ticket值（也可以将Ticket值保存到文件中，此时从文件中读取Ticket） var Cache = CacheHelper.GetCache("ticket"); if (Cache == null) CacheHelper.SetCache("ticket", GetTicket(), 7000); ticket = CacheHelper.GetCache("ticket").ToString(); url = HttpUtility.UrlDecode(url);//url解码 string sign = GetSignature(ticket, guid, timestamp, url); s.appid = appid; s.noncestr = guid; s.timestamp = timestamp; s.signature = sign; //logger.Warn($"url:{url},时间戳:{timestamp},随机数:{guid},ticket:{ticket},sign值:{sign}");//记录日志 return s; } catch (Exception ex) { //logger.Warn(ex); throw ex; } } /// <summary> /// GetTicket 签名密钥 /// </summary> /// <returns></returns> public static string GetTicket() { string token = ""; var Cache = CacheHelper.GetCache("token"); if (Cache == null) CacheHelper.SetCache("token", GetAccessToken(), 7000);//获取AccessToken token = CacheHelper.GetCache("token").ToString(); IDictionary<string, string> dic = new Dictionary<string, string>(); dic["access_token"] = token; dic["type"] = "jsapi"; FormUrlEncodedContent content = new FormUrlEncodedContent(dic); var response = Client.PostAsync("https://api.weixin.qq.com/cgi-bin/ticket/getticket", content).Result; if (response.StatusCode != HttpStatusCode.OK) return ""; var result = response.Content.ReadAsStringAsync().Result; JObject obj = JObject.Parse(result); string ticket = obj["ticket"]?.ToString() ?? ""; return ticket; } /// <summary> /// GetAccessToken /// </summary> /// <returns></returns> public static string GetAccessToken() { IDictionary<string, string> dic = new Dictionary<string, string>(); dic["grant_type"] = "client_credential"; dic["appid"] = appid;//自己的appid dic["secret"] = appsecret;//自己的appsecret FormUrlEncodedContent content = new FormUrlEncodedContent(dic); var response = Client.PostAsync("https://api.weixin.qq.com/cgi-bin/token", content).Result; if (response.StatusCode != HttpStatusCode.OK) return ""; var result = response.Content.ReadAsStringAsync().Result; JObject obj = JObject.Parse(result); string token = obj["access_token"]?.ToString() ?? ""; return token; } /// <summary> /// 签名算法 /// </summary> /// <param name="ticket">ticket</param> /// <param name="noncestr">随机字符串</param> /// <param name="timestamp">时间戳</param> /// <param name="url"></param> /// <returns></returns> public static string GetSignature(string ticket, string noncestr, long timestamp, string url) { var string1Builder = new StringBuilder(); //拼接字符串 string1Builder.Append("jsapi_ticket=").Append(ticket).Append("&") .Append("noncestr=").Append(noncestr).Append("&") .Append("timestamp=").Append(timestamp).Append("&") .Append("url=").Append(url.IndexOf("#") >= 0 ? url.Substring(0, url.IndexOf("#")) : url); string str = string1Builder.ToString(); return SHA1(str);//加密 } public static string SHA1(string content) { return SHA1(content, Encoding.UTF8); } /// <summary> /// SHA1 加密 /// </summary> /// <param name="content">需要加密字符串</param> /// <param name="encode">指定加密编码</param> /// <returns>返回40位小写字符串</returns> public static string SHA1(string content, Encoding encode) { try { SHA1 sha1 = new SHA1CryptoServiceProvider(); byte[] bytes_in = encode.GetBytes(content); byte[] bytes_out = sha1.ComputeHash(bytes_in); sha1.Dispose(); string result = BitConverter.ToString(bytes_out); result = result.Replace("-", "").ToLower();//转小写 return result; } catch (Exception ex) { throw new Exception("SHA1加密出错：" + ex.Message); } } //请求基类 private static HttpClient _client = null; public static HttpClient Client { get { if (_client == null) { var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip, AllowAutoRedirect = false, UseCookies = false, }; _client = new HttpClient(handler); _client.Timeout = TimeSpan.FromSeconds(5); _client.DefaultRequestHeaders.Add("Accept", "application/json"); } return _client; } } /// <summary> /// 十位时间戳 /// </summary> /// <param name="dt"></param> /// <returns></returns> public static int GetTimeStamp(DateTime dt) { DateTime dateStart = new DateTime(1970, 1, 1, 8, 0, 0); int timeStamp = Convert.ToInt32((dt - dateStart).TotalSeconds); return timeStamp; } /// <summary> /// 返回实体 /// </summary> public class WXShare { public string appid { get; set; } /// <summary> /// 随机码 /// </summary> public string noncestr { get; set; } /// <summary> /// 时间戳 /// </summary> public int timestamp { get; set; } /// <summary> /// 签名值 /// </summary> public string signature { get; set; } } public class CacheHelper { /// <summary> /// 获取数据缓存 /// </summary> /// <param name="cacheKey">键</param> public static object GetCache(string cacheKey) { var objCache = HttpRuntime.Cache.Get(cacheKey); return objCache; } /// <summary> /// 设置数据缓存 /// </summary> public static void SetCache(string cacheKey, object objObject) { var objCache = HttpRuntime.Cache; objCache.Insert(cacheKey, objObject); } /// <summary> /// 设置数据缓存 /// </summary> public static void SetCache(string cacheKey, object objObject, int timeout = 7200) { try { if (objObject == null) return; var objCache = HttpRuntime.Cache; //相对过期 //objCache.Insert(cacheKey, objObject, null, DateTime.MaxValue, new TimeSpan(0, 0, timeout), CacheItemPriority.NotRemovable, null); //绝对过期时间 objCache.Insert(cacheKey, objObject, null, DateTime.UtcNow.AddSeconds(timeout), TimeSpan.Zero, CacheItemPriority.High, null); } catch (Exception) { //throw; } } /// <summary> /// 移除指定数据缓存 /// </summary> public static void RemoveAllCache(string cacheKey) { var cache = HttpRuntime.Cache; cache.Remove(cacheKey); } /// <summary> /// 移除全部缓存 /// </summary> public static void RemoveAllCache() { var cache = HttpRuntime.Cache; var cacheEnum = cache.GetEnumerator(); while (cacheEnum.MoveNext()) { cache.Remove(cacheEnum.Key.ToString()); } } } }
微信页面调用：
//页面引用
<script src="http://res.wx.qq.com/open/js/jweixin-1.4.0.js"></script>
<script type="text/javascript"> $(function () { var url = window.location.href; $.ajax({ url: "/WechatJSSDK/GetWxShareInfo", data: { url: url }, success: function (ret) { var appId = ret.appid; var noncestr = ret.noncestr; var timestamp = ret.timestamp; var signature = ret.signature; wx.config({ debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。 appId: appId, // 必填，公众号的唯一标识 timestamp: timestamp, // 必填，生成签名的时间戳 nonceStr: noncestr, // 必填，生成签名的随机串 signature: signature,// 必填，签名，见附录1 jsApiList: ['onMenuShareTimeline', 'onMenuShareAppMessage', 'onMenuShareQQ', 'onMenuShareWeibo', 'onMenuShareQZone', 'chooseImage', 'uploadImage', 'downloadImage', 'startRecord', 'stopRecord', 'onVoiceRecordEnd', 'playVoice', 'pauseVoice', 'stopVoice', 'translateVoice', 'openLocation', 'getLocation', 'hideOptionMenu', 'showOptionMenu', 'closeWindow', 'hideMenuItems', 'showMenuItems', 'showAllNonBaseMenuItem', 'hideAllNonBaseMenuItem', 'scanQRCode'] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2 }); } }); wx.ready(function () { // config信息验证后会执行ready方法，所有接口调用都必须在config接口获得结果之后，config是一个客户端的异步操作，所以如果需要在页面加载时就调用相关接口，则须把相关接口放在ready函数中调用来确保正确执行。对于用户触发时才调用的接口，则可以直接调用，不需要放在ready函数中。 }); wx.error(function (res) { // config信息验证失败会执行error函数，如签名过期导致验证失败，具体错误信息可以打开config的debug模式查看，也可以在返回的res参数中查看，对于SPA可以在这里更新签名。 }); //更换图片 $('[name="avatar"]').click(function () { wxChooseImage(); }); //拍照或从手机相册中选图接口 function wxChooseImage() { wx.chooseImage({ count: 1, needResult: 1, sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有 sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有 success(res) { var localId = res.localIds[0]; var layer_index = layer.load(1); UploadImage(localId, function (ret) { layer.close(layer_index); switch (ret.code) { case 0: $('[name="avatar"]').attr("src", ret.msg); break; default: Common.alert('fail', ret.msg); break; } }); }, fail: function (res) { alert("操作提示", JSON.stringify(res), "1", "确定", "", "", ""); } }); } }); //获取本地图片 function UploadImage(localId, callback) { wx.getLocalImgData({ localId: localId, // 图片的localID success: function (res) { var localData = res.localData; // localData是图片的base64数据，可以用img标签显示
//上传服务器 $.ajax({ url: '服务器端接收地址', data: { img_base64: localData }, success: callback });
//立即预览
if (localData.indexOf('data:image') != 0) {
//判断是否有这样的头部
localData = 'data:image/jpeg;base64,' + localData;
}
localData = localData.replace(/\r|\n/g, '').replace('data:image/jgp', 'data:image/jpeg');
$('[name="img_base64"]').attr('src', localData);
}
});
}
</script>
